prerenal azotemia

azotemia

an excess of nitrogen-containing compounds in the blood. See also uremia.

---

postrenal azotemia

is caused by reduced renal blood flow caused by increased pressure within the renal collecting system, e.g. hydronephrosis and urine retention from a variety of causes.

prerenal azotemia

is due to extrarenal causes that reduce renal blood flow and glomerular filtration, e.g. dehydration, shock, reduced cardiac output, decreased plasma albumin osmotic pressure.

primary renal azotemia

results from loss of renal functional parenchyma.

---

prerenal azotemia

Renal underperfusion Nephrology The most common form of acute renal failure, characterized by ↑ nitrogenous waste, due to ↓ blood flow to the kidney Lab ↑ nitrogenous wastes–eg, creatinine and urea, which act as poisons when they accumulate in the body, damaging tissues and compromising organ function Risk factors ↓ blood volume–eg, dehydration, prolonged vomiting, diarrhea, bleeding, burns, etc; pump failure–eg, CHF, shock, kidney trauma or surgery, renal artery embolism, and other types of renal artery occlusion. See Renal failure.